1540125215220 has 48 divisors (see below), whose sum is σ = 4316090909760. Its totient is φ = 410343837696.

The previous prime is 1540125215173. The next prime is 1540125215221. The reversal of 1540125215220 is 225125210451.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540125215221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11062110 + ... + 11200469.

It is an arithmetic number, because the mean of its divisors is an integer number (89918560620).

Almost surely, 2^{1540125215220} is an apocalyptic number.

1540125215220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540125215220 is an abundant number, since it is smaller than the sum of its proper divisors (2775965694540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1540125215220 is a wasteful number, since it uses less digits than its factorization.

1540125215220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22263744 (or 22263742 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 1540125215220 in words is "one trillion, five hundred forty billion, one hundred twenty-five million, two hundred fifteen thousand, two hundred twenty".